SpongeBob SquarePants S04 E14 Dunces and Dragons

"Be there and be square!"

After a freak jousting accident at a Medieval Times-style restaurant, SpongeBob and Patrick are transported to a medieval version of Bikini Bottom. There they are mistaken for great knights and sent on a quest by King Krabs to rescue his daughter, the Princess Pearl, from the clutches of the evil wizard Planktonamor.